Date: Sun, 25 Jan 2004 14:19:25 -0800 (PST) From: Don Lewis <truckman@FreeBSD.org> To: mat@cnd.mcgill.ca Cc: current@FreeBSD.org Subject: Re: dev/sound/pcm/* patch testers wanted Message-ID: <200401252219.i0PMJP7E076017@gw.catspoiler.org> In-Reply-To: <20040125173244.GA95238@cnd.mcgill.ca>
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On 25 Jan, Mathew Kanner wrote: > On Jan 24, Don Lewis wrote: >> The is a buffer overflow in the interrupt handler in the vchan code that >> occasionally stomps on something on the kernel heap and causes panics in >> other parts of the kernel. I tracked down the cause of the buffer >> overflow with the help of Stefan Ehmann and made a number of changes to >> the sound/pcm/* code to try to avoid triggering the overflow. > >> [...] > > Don, > I think it should be noted that vchans aren't always enabled > by default and those testing this patch should explicitly make sure > that vchans are enabled either via > > sysctl hw.snd.pcmX.vchans=5 That's a good point. I'd also like to make sure that I didn't break anything in the non-vchan case, so testing with vchans on and off would be useful.
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